Hard to believe it's been 20 years since Oasis lunged forth onto a drab U.K. music scene. The Madchester hangover was lingering, and life needed to be pumped into the veins. Stat! Enter four brazen lads from Manchester, armed with power chords and attitude to spare, who would transform the British music scene in short order.

A new documentary about the band's debut album, 'Definitely Maybe,' dives into its history, talking to group members, journalists, fans and fellow musicians along the way. "For me, as a debut album, it's probably the second best debut album of all time," says Stone Roses bassist Mani, who then confesses he thinks the top honor belongs to his own band's 1989 debut.

You can watch the hour-long documentary above.

With tracks like 'Supersonic,' Rock & Roll Star' and 'Live Forever,' 'Definitely Maybe' was the right album at the right time. And it still sounds great. "They were kinda ramshackle," recalls their record company chief Alan McGee, "but really together." Manager Marcus Russell notes how the band had its hooks firmly grasping rock 'n' roll history -- "basically drawing on all the great rock music, from the Beatles to Slade through the Sex Pistols."

'Definitely Maybe' remains a loud and intriguing artifact from the era and has just been given the anniversary deluxe-reissue treatment. It kicks off the Oasis - Chasing the Sun reissue series that focuses on their first three albums.

Due later this year are the band's second and third albums, '(What's the Story) Morning Glory?' and 'Be Here Now.' 'Definitely Maybe,' which is out today, comes in various configurations featuring bonus tracks like demos, B-sides, live versions and leftovers from the album's sessions.

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